(19)
(11) EP 1 164 567 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.07.2002 Bulletin 2002/31

(43) Date of publication A2:
19.12.2001 Bulletin 2001/51

(21) Application number: 01305137.0

(22) Date of filing: 13.06.2001
(51) International Patent Classification (IPC)7: G09G 3/36
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 14.06.2000 JP 2000177928

(71) Applicant: SONY CORPORATION
Tokyo (JP)

(72) Inventors:
  • Yamashita, Junichi, Sony Corporation
    Tokyo (JP)
  • Kashima, Tomohiro, Sony Corporation
    Tokyo (JP)

(74) Representative: Ayers, Martyn Lewis Stanley 
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)

   


(54) Active matrix display device and method of driving the same


(57) A liquid crystal display driven by a dot-line inversion driving method in combination with a 2-step dot sequential precharge driving method which, if black window or black lines are displayed, is free of horizontal trails on circumscribing portions thereof is provided. Before video signals having opposite polarities are applied to signal lines, first, a full-line precharge pulse is generated in the horizontal blanking periods, and precharge gray signals which have the same polarity as that of the previous pixel potential are written together based on the full-line precharge pulse. Then, precharge black signals having the same polarity as that of one of the video signals, and precharge gray signals having the same polarity of that of the other video signal are written in two steps.






Search report